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<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>ES8 对象方法扩展</title>
</head>

<body>
    <script>
        //声明对象
        const school = {
            name: "尚硅谷",
            cities: ['北京', '上海', '深圳'],
            xueke: ['前端', 'Java', '大数据', '运维']
        };

        //获取对象所有的键
        // console.log(Object.keys(school));
        //获取对象所有的值
        // console.log(Object.values(school));
        //entries 返回数组，里面是由键值组成的三个数组
        // console.log(Object.entries(school));
        //创建 Map
        const m = new Map(Object.entries(school));
        console.log(m.get('cities'));

        //对象属性的描述对象
        console.log(Object.getOwnPropertyDescriptors(school));

        // const obj = Object.create(null, {
        //     name: {
        //         //设置值
        //         value: '尚硅谷',
        //         //属性特性
        //         writable: true,
        //         configurable: true,
        //         enumerable: true
        //     } 
        // });
    </script>
</body>

</html>